2050520309 has 4 divisors (see below), whose sum is σ = 2050660416. Its totient is φ = 2050380204.

The previous prime is 2050520293. The next prime is 2050520321. The reversal of 2050520309 is 9030250502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2050520309 - 2⁴ = 2050520293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2050520209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45149 + ... + 78354.

It is an arithmetic number, because the mean of its divisors is an integer number (512665104).

Almost surely, 2^2050520309 is an apocalyptic number.

It is an amenable number.

2050520309 is a deficient number, since it is larger than the sum of its proper divisors (140107).

2050520309 is a wasteful number, since it uses less digits than its factorization.

2050520309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140106.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 2050520309 is about 45282.6711778358. The cubic root of 2050520309 is about 1270.4415578700.

The spelling of 2050520309 in words is "two billion, fifty million, five hundred twenty thousand, three hundred nine".